Comix is a user-friendly, customizable image viewer. It is specifically designed to handle comic books, but also serves as a generic viewer. It reads images in ZIP, RAR or tar archives (also gzip or bzip2 compressed) as well as plain image files.

Advanced music player for GNU/Linux, also running on FreeBSD, OpenBSD and Microsoft Windows. Plays audio CDs, internet radio streams, podcasts and soundfiles in just about any audio format and has the feature of inserting no gaps between adjacent tracks.

This is ATARI XE/XL game ported to Linux. This game was very popular and was one of the greatest ATARI games. You can see similarities to sokoban, but this game has more features like shooting, unfriendly animals.... SDL, SDL_image, SDL_mixer and SDL_ttf

PPR is a spooler for PostScript printers. It supports PPD files, and provides operator alerts, job result messages, and error recovery. It is integrated with Netatalk, CAP60, Samba, and Ghostscript. It has command line and web interfaces.

The Hosting Services Management System (often called Admin-panel) is intended to provide Web hosters and their clients with robust, powerful but simple enought interface for manage their webhosting related objects.

ChemVisio is software which might be useful for educational purposes (non-organic chemistry, crystallography etc.). It might be a good visualization support for all people who need better illustrations than that you could see in books.